Triple valve



March 27, 192s. y i,6'63,s37

H. HANSEN TRIPLE vALvE Filed Jan.18. 1927 s sheets-sheet 1 FROM SEKE PWE *o A Z8 ///////\11Z0/ V ze 50 3; ZZ Z4 Z@ 29a Z3 HENfalV/QSEN Z9@ 2,9 www ATTOR N EY March 27, 1928. i 1,663,837

H. HANSEN l Z6 295 30V INVENTOR 3, ZZ 24 29a HENRY HANSEN ATTORNEY 1,663,837 H. HANSEN TRIPLE VALVE Filed Jan-18. 1927 5 Sheets-Sheet 3 n March 27, Y1928.V

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C `2a Z/Z3 Z Inh-:mon V HENRY HANSEN BY 29h 29C ATTORNEY 27 Z6 e ZZ 24 Patented Mar. 27, 1928.

UNITED 1,663,833! Pifi-"reis:r

maar Sellem 0F Bises@ @Rie-.Qae-

Appucauo'n' med January 1s, 1927. serial No. 161,895.

My invention relates to triple valves for air bralre systems and it has particular reference to the type K triple valve.

. In valves of this character, as previously constructed, recharging 'ol' the auxiliary reservoir following a brake application can be .eiected only fby bleeding .the brake cylinder to atmosphere, resulting in a complete brake releasel VheI-e a .prolonged brakeapm 'plication is required'without cessation, the present triple valve is a failure, by reason of the fact' that beforeV thefaux'iliary Vreservoir can be'recharged to .maintain the brakes applied a brake release must foccur, .thus l5 destroying t-'he continuity of the brake application. l v

It is a .purpose of my invention to provide a triple valve by which the auxiliary reservoir is recharged Without producing a brake release, so that aprolonged brake afpplication can be effected when required. My linvention is primarily desigaiedlto eliminate the attendant danger olf 'intermittent' brake applications When'contin-ued brake application is demanded Ato' lsafelycontrol' the move'- ment of al train or car descending` relatively long Vgrades,such intermittent applications producing intervening" periods in Whi'chthe train or car is Without brake application and the several periods to'talizing with the result that 'the train or car finally'becomes beyond the'control of the braking' system.

It is also'fa'` purpose ol my invention to provide a triple AValve of the labovedescribell character which adl'ieres closely to the 'sti-ncture of 'the present triple valve to the extent that it may be construed as' an attachment therefor, and hence thefpre'sent valve islno't rendered obsolete as a whole. i

l will describe only one form of ntriple valve embodying my invention and W-'ill `then point out the novel features thereof in cl'ai-ins. A

In the accompanying dr'avvi'ngs,Vv

Figure `lis a vieivv lsho'vving in vertical section one forni of triple valve embodying my invention in applied position to'gan auxiliary reservoir and l rake pip'e'vvith the valve in a'service application position;

Figure 2 is a vertical sectional view taken on the line 2-2 of Figure 1;

Figure 3 .is a vievv similar to lFigure 1 showing the valve in full release and charging position; 1 f 55 y Figure 4 is al sectional v-ieyv takenv on the Figure 7 is a View showing confrontingv Lsides or the slide valve` and' seat embodied in the triple valve shown in the preceding' views.

f As previously state'd,'1n inventionadhercs .closely to the structure; ou the present triple valve and although I have shown a complete 'triple'valve I will describe in detail only bhoseparts necessary to a clear understanding oi' the' construction and operation of my triple valve.y As sh'ovv'ii inv Figure 1, P designates a piston' movable in Va 'cylinder havinga liner 15 grooved toprovide a lport 16', the piston being movable' .luid prcssure to gcover and uncover Ithe port 16;.'n'd thus co-o'perat-ing with the latter lo form what I .termv a' nrain' valve. This merit-1' valve isk operable to control the admission of air in the recharging nof an auxiliary reservoir A, air being suppliedv thereto from Aa brake pipeto which the .triple valve is eoi-'ifnect'ed as indicated by the. legend 'in Figure '1. y As inthe conventional triple valve, the piston P is movable to operate' a slide valve' S' on a. seat T, and the seatv is secured on what I term a body B of the' tri-ple valve.

` As clearly shown inf-Figure y7, the slide valve S is provided' v vitli ai Ycavi-tv 17' and a. 'port' 18.7` The valve provided -with' other ports to Vco'nliorin to the conventional slide valve but as they do not enter into tl'ie novel fea-tures of k,my triple valve they will not ybe described and' have not been sl'io'ivn in -F igure 7 The vcavity 17 corresponds to the usual cavity of the slide valve but it isv of different contour, as 4clearly illustrated in vFigure 7, andpis formed With' an extension 17a, the purpose of .WhichVWilfl be described hereinafter. f'Ihe' valve seat T is" prov'ikled ywithxthe usual ports, and" those with which 'We arc concerned have been illustrated in VFigure 7 andv designatedlll) and 20j Horv- .the port 2/0.Y The .ports 21' and 22 are con1 tinuations of ports 23 and 24e, respectively, formed in the body of the triple valve, as clearly shown in Figure 2, and secured to the side of the body is acylinder C, the inner end of Which is provided with a port 25 constituting a continuation of the port 23, and a passage 26 Which constitutes a continuation of the port 24. The port 25is for. the purpose ofl admitting air under pressure to the cylinder C to actuate a piston 27 having a rod 28 to which is fixed a supplemental or exhaust valve V. An exhaust port 29 is formedin the cylinder C by Which air under pressure may be exhausted to atmosphere, and the rapidity of such Vexhaust can be controlled .by a cap 29a threaded on a pipe 29h, the latter being threaded in the port as shown in Figure 2. The cap 29a is any one of a plurality of such caps which can be formed with different size openings 29C. The larger the opening the more rapid the exhaust of air to atmosphere, hence the rate of exhaust can be regulated as desired by the application of a cap having the proper size opening. This port is adapted to be placed in communication with the passage 26 through a cavity 30 formed in the valve V, butonly when the valve occupies the position shown in Figure 6, as will be described hereinafter. A spring 28iL is assoeiated With the rod 28 to normally urge the piston 27 and the valve V to the position shown in Figure 6.

The body B is provided With a passage 31 which at one end is in communication 'Withthe p'ort 2O of the Vvalve seat T, its

opposite end being in communication vWith a pipe 32jvvhich leads to the bralrecylinder (not shown). When the port 18 of the slide valve S is in registration with the port 20, fluid pressure from the auxiliary reservoir A can be supplied to the brake cylinder through the passage 31 and the pipe 32. The body B is also provided with the usual exhaust port 33 Which in previous triple valves functioned to exhaust the brake cylinder to atmosphere, but which in the present instance functions to exhaust the cylinder C to atmosphere.

The operation of the triple valve is as follows: The valve is illustrated in Figure 1 as in a service application position in which fluid pressure from the auxiliary reservoir A is supplied to the brake cylinder to effect a brake application through the port 18 of the valve S, port 20 of the seat T, and passage 31 to the pipe 82. Slightly in advance of' the admission of fluid pressure to the brake cylinder, the port 18 functions to supply air to the cylinder C through the ports 21, 23 and 25. lVith admission of fluid pressure to the cylinder C, the piston 27 is moved from its normalposition and against the action of the spring 28a to the solid line position shown in Figure 2. Un-

der this movement the valve V is shifted so that its cavity 3() is out of registration With the passage 26 and the exhaust port 29. Manifestly the valve V in its new position functions to prevent the exhaust of' fluid to atmosphere.

Referring novv to Figure 3, the piston P has, been advanced by the admission of fluid pressure thereto from the main reservoir to uncover the port 16, thus admitting fluid pressure to the auxiliary reservoir Ato effect recharging of the latter. Under this movement of' the piston P the slide valve ,S is advanced to the position shown in which the port 18 is moved out of registration with the port 2O whereby kurt-her admission of fluid pressure to the brake cylinder is discontinued. This position of the slide valve and piston is referred to in the art as the full release and charging position, but in my type of triple valve no release of the brakes is effected because of the fact that air cannot be exhausted from the brake cylinder. By reference to Figure 4 it Will be seen that in the advanced positionof'- the slide valve S the port 21 is closed, thus trapping fluid pressure Within the cylinder C to maintain the piston 27 in the advanced position and the valve V in closed position in respect to the exhaust port 29. Thus recharging of the auxiliary reservo-ir takes place While a brake application isv maintained. It is this operation of my triple valve Which distinguishes it from present valves, as hereinbefore explained.

Referring noW to Figure 5, the triple valve Resultant of this nevv` position, the slideV valve functions to permit fluid pressure to beV exhausted from the cylinder C, thereby allowing the piston 27 toV return to normal position under the action of the spring 28, and as a consequence moving the valve V so that its cavity 30 registers With the passage 26 and the exhaust port 29, therebyfplacing the passage 26 in communication With atmosphere. The fluid pressure in the brake cylinder can now be exhausted to atmosphere through Vthe passagel, ports 20, 22 and v24 to the passage 26. Thus in the retarded release position a releaseo't' the brakes is effected. e y

Although I have herein shovvn and described only one form of triple valve embodying my invention, it is to be understood that various changes and modications may be ma-de therein Without departing fromthe spirit of the invention and the spirit and scope of the appended claims. v

` I claim -as my invention:

iary reservoir, a subsidiary valve adapted to control charging of a. brake cylinder, a

supplemental valve adapted to control'thef h'austing itv from Athe brake. cylinder only Vwhen the valve is in retarded release posieXhaust ofthe brake cylinder, and means operable upon movement of the main valveY to a position in which the auxiliary reservoir is being recharged for moving the supplemental valve to 'non-exhausting position whereby a brake'application is maintained While recharging the auxiliary reservoir.V

2. A triple valve having means adapted to admit fluid pressure to a brake cylinder' When the valve is in service application position, means adapted for admitting fluid pressure to an auxiliary reservoir for recharging the latter When the valve is in full release and charging position, and means adapted Vfor trapping Huid pressure in the brake cylinder When the valve is in fullA release andlcharging position and maintaining the fluid Vpressure trapped in theV cylinder so long as the valve occupies full release position.

v3'. A triple valve having means adaptedV to admit fluid pressure to a brake cylinder Vwhen the valve is in service application position, means adapted for admitting fluid pressure to an auxiliary reservoir for vrecharging the latter When the Valve is in full release and chargingf position and means adapted for trapping fluid pressure in the brake cylinder rvvhen the valve is in' yfull release and charging position andffor eX- tion'. i y

lfIn a triple valve, a lslide valve having therein a port and a cavity, ka seat on Which the valve is slidable having tWo pairs of ports, a body having an exhaust port, aV

passage, and a pair of ports communicating respectively with the poi-ts of one pair of the seat ports, a cylinder, a piston inthe cylinder, aivalve movable with the piston,

an admission port inthe cylinder communieating With one port of one of the pairs of body ports, a passage in the cylinder communicating With the other of the pair of body ports,r an exhaust port in the cylinder adapted to be placed in communication With the passage of tlieeylinder ywhen the valve therein is in open position, andmeans for yieldably4 'urging the piston to a position in `which the valve isl open. HENRY HANSEN. 

